First evidence of Hadrosauropodus in Gondwana (Yacoraite Formation, Maastrichtian-Danian), northwestern Argentina

Díaz-Martínez, Ignacio; Valais, Silvina de; Cónsole-Gonella, Carlos

doi:10.1016/j.jafrearsci.2016.02.012

Cited by 18 publications

(16 citation statements)

References 45 publications

(71 reference statements)

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“…In the Maimará locality, the fossil record of the Yacoraite Formation is made up of gastropods, ostracods, fish remains, vertebrate tracks, invertebrate trace fossils, microbialites (Díaz-Martínez et al 2016;Cónsole-Gonella et al 2017), and palynomorphs (Moroni, 1984). The studied stratigraphic section records a lagoon palaeoenvironment with tidal influence associated with supratidal bodies of ephemeral ponds, described by Cónsole-Gonella et al (2017).…”

Section: Geological Contextmentioning

confidence: 99%

Three-dimensional stromatolites from Maastrichtian–Danian Yacoraite Formation, Argentina: modelling and assessing hydrodynamic controls on growth patterns

et al. 2021

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Stromatolites are biogenic sedimentary structures formed by the interplay of biological (microbial composition) and environmental factors (local hydrodynamic conditions, clastic input and/or water chemistry). Well-preserved, three-dimensional (3D) fossil stromatolites are key to assessing the environmental factors controlling their growth and resulting morphology in space and time. Here, we report the detailed analysis of well-exposed, highly informative stromatolite build-ups from a single stratigraphic horizon within the Maastrichtian–Danian Yacoraite Formation (Argentina). This study focuses on the analysis of depositional processes driving intertidal to shallow subtidal stromatolites. Overall depositional architecture, external morphology and internal arrangement (mega, macro, meso and microstructures) of stromatolite build-ups were analysed and combined with 3D photogrammetric models, allowing us to decipher the links between stromatolite structure and tidal dynamics. Results suggest that external morphology and architecture of elongated and parallel clusters grew under the influence of run-off channels. The internal morphology exhibits columnar structures where the space between columns is interpreted as recharge or discharge channels. This work supports the theory that stromatolites can be used as a high-resolution tool in the assessment of water dynamics, and provides a new methodological approach and data for the dynamic reconstruction of intertidal stromatolite systems through the geological record.

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Section: Geological Contextmentioning

confidence: 99%

Three-dimensional stromatolites from Maastrichtian–Danian Yacoraite Formation, Argentina: modelling and assessing hydrodynamic controls on growth patterns

et al. 2021

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“…This kind of tracks, called informally as large ornithopod tracks, has been previously related with large iguanodontian trackmakers (see Díaz-Martínez et al, 2015b). In the Latermost Cretaceous, the unique large representatives of the Iguanodontia clade are the hadrosaurids (see Díaz-Martínez et al, 2016), so we propose these last dinosaurs as the trackmakers of PC-1-A and B. The third track, PC-1-C, is poorlypreserved, thus we consider it as an indeterminate vertebrate track.…”

Section: Preservation and Characterisation Of The Vertebrate Tracks Fmentioning

confidence: 78%

Vertebrate tracks from the Paso Córdoba fossiliferous site (Anacleto and Allen formations, Upper Cretaceous), Northern Patagonia, Argentina: Preservational, environmental and palaeobiological implications

Díaz-Martínez

Cónsole-Gonella

Valais

et al. 2018

Cretaceous Research

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The Paso C ordoba fossiliferous site (Río Negro, Northern Patagonia) is one of the first Mesozoic fossiliferous localities studied in Argentina. There, turtle, crocodile and dinosaur remains as well as dinosaur and bird tracks have been recorded. Recently, a new locality with vertebrate tracks, the Cañad on del Desvío, has been discovered in Paso C ordoba. Six track-bearing layers were located in outcrops belonging to the Anacleto (lower to middle Campanian, Neuqu en Group) and Allen (middle Campanian-lower Maastrichtian, Malargüe Group) formations. The Cañad on del Desvío locality reveals that vertebrate trace fossils are distributed in two distinct environments, floodplains of a meandering fluvial to shallow lacustrine system and a wet interdune deposit that is associated to an aeolian setting. Also, in the logged section several soft sediment deformation structures were found. In regard of this, a sedimentary facies analysis is provided in order to assess the palaeoenvironmental implications of this new record. The analysed tracks are preserved in cross-sections, on bedding-planes and as natural casts. When it is possible, the tracking surface, true tracks, undertracks and overtracks/natural casts have been identified and the track preservation and the formation history of the tracksite are discussed. Only two tracks preserve enough anatomical details to relate them with their trackmakers, in this case hadrosaurid dinosaurs. The stratigraphical, facial and palaeoenvironmental data of this study support the idea of a transitional passage between the Anacleto and Allen Formation in Paso C ordoba. The presence of hadrosaurid dinosaur tracks suggests that the upper part of the log, where this kind of tracks were found, likely belong to Allen Formation due to this dinosaurs appear in the Southern Hemisphere in this epoch. The sum of osteological and ichnological remains improve the Paso C ordoba palaeofaunistic knowledge. The presence of six different levels in which the trackmakers walked reflects the abundance of vertebrates in the transition between Anacleto and Allen formations.

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“…Few track sites with ornithopod tracks of Cenomanian age are cited from Brazil and Argentina (Calvo, 1991;Carvalho, 2001). In addition, large ornithopod tracks have been cited in the uppermost Cretaceous of Argentina and Peru (Alonso, 1980;Alonso and Marquillas, 1986;Jaillard et al, 1993;Díaz-Martínez et al, 2016). All the putative trackmakers of these tracks are related with large-sized iguanodontian ornithopods (see Díaz-Martinez et al, 2015.…”

Section: Late Cretaceous Biodiversity Of South American Ornithopodsmentioning

confidence: 99%

First ornithopod remains from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous), northern Patagonia, Argentina

Cruzado‐Caballero

Filippi²,

Méndez

et al. 2018

Cretaceous Research

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First evidence of Hadrosauropodus in Gondwana (Yacoraite Formation, Maastrichtian-Danian), northwestern Argentina

Cited by 18 publications

References 45 publications

Three-dimensional stromatolites from Maastrichtian–Danian Yacoraite Formation, Argentina: modelling and assessing hydrodynamic controls on growth patterns

Three-dimensional stromatolites from Maastrichtian–Danian Yacoraite Formation, Argentina: modelling and assessing hydrodynamic controls on growth patterns

Vertebrate tracks from the Paso Córdoba fossiliferous site (Anacleto and Allen formations, Upper Cretaceous), Northern Patagonia, Argentina: Preservational, environmental and palaeobiological implications

First ornithopod remains from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous), northern Patagonia, Argentina

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